RFR(XS): 8071687: AIX port of "8039173: Propagate errors from Diagnostic Commands as exceptions in the attach framework"

[Volker Simonis]

Hi,

can I please have a review for this AIX-only change.

It is an exact copy of the changes done in "8039173: Propagate errors
from Diagnostic Commands as exceptions in the attach framework" into
the corresponding AIX files.

http://cr.openjdk.java.net/~simonis/webrevs/2015/8071687
https://bugs.openjdk.java.net/browse/JDK-8071687

Thank you and best regards,
Volker